[Research and survey methods]
Sejong University Tourism Industry Research Lab. and Consumer Insight conducted a joint-survey on overseas tourists to gather information on their experiences this past year (September 2016 ~ August 2017) and their evaluation of vacation packages. With Consumer Insight`s 800,000 IBP (Invitation Based Panel) as a sampling frame, a sample group of 26,100 people participated. The sampling method was based on population ratio, participants were chosen based on proportional allocation based on sex, age, and region. Email and mobile devices were used for data collection.